kernel/drivers/tty/serial/imx.c, branch linux-5.1.y

serial: imx: fix error handling in console_setup

2018-11-27T08:56:20Z

The ipg clock only needs to be unprepared in case preparing per clock fails. The ipg clock has already disabled at the point. Fixes: 1cf93e0d5488 ("serial: imx: remove the uart_console() check") Signed-off-by: Stefan Agner Reviewed-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman

Merge 4.19-rc6 into tty-next

2018-09-30T15:11:09Z

We want the tty/serial fixes in here as well. Signed-off-by: Greg Kroah-Hartman

serial: imx: restore handshaking irq for imx1

2018-09-20T12:51:31Z

Back in 2015 when irda was dropped from the driver imx1 was broken. This change reintroduces the support for the third interrupt of the UART. Fixes: afe9cbb1a6ad ("serial: imx: drop support for IRDA") Cc: stable Signed-off-by: Uwe Kleine-König Reviewed-by: Leonard Crestez Signed-off-by: Greg Kroah-Hartman

tty: serial: imx: add pinctrl sleep/default mode switch for suspend

2018-09-18T14:07:24Z

On some i.MX SoCs' low power mode, such as i.MX7D's LPSR(low power state retention), UART iomux settings will be lost, need to add pinctrl sleep/default mode switch during suspend/resume to make sure UART iomux settings are correct after resume. Signed-off-by: Anson Huang Acked-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman

tty: serial: imx: add lock for registers save/restore

2018-09-18T14:07:24Z

In noirq suspend/resume stage with no_console_suspend enabled, imx_uart_console_write() may be called to print out log_buf message by printk(), so there will be race condition between imx_uart_console_write() and imx_uart_save/restore_context(), need to add lock to protect the registers save/restore operations. Signed-off-by: Anson Huang Acked-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman

tty:serial:imx: use spin_lock instead of spin_lock_irqsave in isr

2018-09-18T14:07:24Z

Before the program enters the uart ISR, the local interrupt has been disabled by the system, so it's not appropriate to use spin_lock_irqsave interface in the ISR. Signed-off-by: jun qian Reviewed-by: Barry Song <21cnbao@gmail.com> Signed-off-by: Greg Kroah-Hartman

tty: serial: imx: correct dma cookie status

2018-06-28T12:02:38Z

Correct to check the right rx dma cookie status in spit of it works because only one cookie is running in the current sdma. But it will not once sdma driver support multi cookies running based on virt-dma. Signed-off-by: Robin Gong Reviewed-by: Sascha Hauer Acked-by: Uwe Kleine-König Tested-by: Lucas Stach Signed-off-by: Greg Kroah-Hartman

serial: imx: fix comment about UCR2_SRST and its handling for shadowing

2018-06-28T12:02:38Z

Initially when register shadowing was introduced (commit 3a0ab62f43de ("serial: imx: implement shadow registers for UCRx and UFCR")) the logic to handle UCR2_SRST was wrong but documented consistently. Later the handling was fixed, but the comment was not. This change makes up leeway for the latter. Fixes: 0aa821d846c0 ("serial: imx: fix cached UCR2 read on software reset") Signed-off-by: Uwe Kleine-König Reviewed-by: Stefan Agner Signed-off-by: Greg Kroah-Hartman

serial: imx: disable UCR4_OREN on shutdown

2018-05-25T15:54:43Z

UCR4_OREN is (depending on the configuration) enabled in startup, but is never disabled. Fix this by disabling it in shutdown. Reported-by: Nandor Han Signed-off-by: Sebastian Reichel Acked-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman

serial: imx: drop CTS/RTS handling from shutdown

2018-05-25T15:54:42Z

According to Documentation/serial/driver the shutdown function should not disable RTS, so drop it. Suggested-by: Uwe Kleine-König Signed-off-by: Sebastian Reichel Acked-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman